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77/75/23/21 English Instruction Sheet
Page 1
®
77/75/23/21
Series III Multimeter
Instruction Sheet
W Read First: Safety Information
• Never use the meter if the meter or test leads look damaged.
• Be sure the test leads and switch are in the correct position for
the desired measurement.
• Never measure resistance in a circuit when power is applied.
• Never touch the probes to a voltage source when the test
leads are plugged into the 10 A or 300 mA input jack.
• Never apply more than the rated vo
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77/75/23/21 English Instruction Sheet Page 2 Input Jacks Milliamp Volts, Ohms, V Diode Test 600V CAT 1000V CAT Common Amp Terminal FUSED hc1f.eps See Specifications for overload protection. Autorange The meter defaults to autorange when you turn on the meter. Manual Range Manual ranging is available in V ac, V dc, ohms, A ac, and A dc. MANUAL MANUAL RANGE RANGE Momentary CAT CAT _ + hc11f.eps To return to autorange, press for 1 second or turn the rotary switch.
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77/75/23/21 English Instruction Sheet Page 3 Automatic Touch Hold Mode W Warning To avoid electric shock, do not use the Touch Hold mode to determine if a circuit with high voltage is dead. The Touch Hold mode will not capture unstable or noisy readings. The Touch Hold mode automatically captures and displays stable readings for all functions. HOLD AUTO HOLD HOLD HOLD HOLD RANGE RANGE RANGE Momentary V V V CAT CAT __ _ + + + Single Beep hc4f.eps When the meter captures new input, it bee
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77/75/23/21 English Instruction Sheet Page 4 Standby If the meter is on but is inactive for an hour (20 minutes in diode test), the display goes blank and displays four bar graph segments. To resume operation, turn the rotary switch or press a button. AC and DC Voltage (K L L) m Volts AC Volts DC Millivolts DC RANGE RANGE RANGE mV V V CAT CAT CAT CAT CAT CAT __ _ + + + hc3f.eps Resistance (e) Turn off the power and discharge all capacitors. An external voltage across a component will gi
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77/75/23/21 English Instruction Sheet Page 5 Diode Test (G) Good Diode Good Diode RANGE RANGE CAT CAT CAT __ + + Single Beep Forward Bias Reverse Bias Bad Diode Bad Diode RANGE RANGE CAT CAT CAT CAT _ _ + + and Open Shorted hc5f.eps
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77/75/23/21 English Instruction Sheet Page 6 Continuity Test ( R ) RANGE RANGE CAT CAT CAT CAT _ _ + + hc8f.eps If continuity exists (resistance < 210 Ω for Models 21/75 and <270 Ω for Models 23/77), the beeper sounds continuously. The meter beeps twice if it is in Touch Hold mode. Current (? A) W Warning To avoid injury, do not attempt a current measurement if the open circuit voltage exceeds the rated voltage of the meter. To avoid blowing an input fuse, use the 10 A jack until you are
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77/75/23/21 English Instruction Sheet Page 7 Probe Holder hc14f.eps Maintenance W Warning To avoid electric shock, remove the test leads before opening the case, and close the case before using the meter. To prevent fire and possible arc- flash, use fuses with ratings shown on the back of the meter. Caution To avoid contamination or static damage, do not touch the circuit board without proper static protection. Internal Fuse Test 300 mA 10 A RANGE 4-8 Ω OK <.5 Ω OK OK OK hc9f.eps
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77/75/23/21 English Instruction Sheet Page 8 Battery Replacement Note Before opening the case, make sure the test leads are removed and the rotary switch is turned to OFF. hc12f.eps Fuse Replacement F1 F2 F2 F1 23/77 21/75 hc13f.eps Cleaning To clean the meter, use a damp cloth and mild detergent; do not use abrasives or solvents on the meter.
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77/75/23/21 English Instruction Sheet Page 9 Service and Parts To contact Fluke, call one of the following telephone numbers: USA and Canada: 1-888-99-FLUKE (1-888-993-5853) Europe: +31 402-678-200 Japan: +81-3-3434-0181 Singapore: +65- -276-6196 * Anywhere in the world: +1-425-356-5500 Or, visit Fluke’s Web site at www.fluke.com. Item Description Fluke Quan. PN BT1 Battery, 9 V, NEDA 1604/IEC 6F22, or 696534 1 NEDA 1604A/IEC 6LR61 614487 Models 21/75: F1* Fuse, F630 mA, 250 V, Min Interru
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77/75/23/21 English Instruction Sheet Page 10 Electromagnetic Compatibility Total accuracy = Specified accuracy In RF field of 3 V/m on all + 0.1% of range. functions. Relative Humidity except 32 MΩ range 0% to 90% (0°C to 35°C) 0% to 70% (35°C to 50°C) 32 MΩ range only 0% to 80% (0°C to 35°C) 0% to 70% (35°C to 50°C) Altitude Operating: 2000 meters Storage: 12,000 meters Battery Type 9 V NEDA 1604 or 6F22 or 006P, or NEDA 1604A or 6LR61 Battery Life 2000 hrs typical with alkaline 1600 hrs typic
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77/75/23/21 English Instruction Sheet Page 11 Function Range Accuracy 3.200 V, 32.00 V, 320.0 V ±(0.3%+1) L 600 V (21/75), 1000 V (23/77) ±(0.4%+1) 320.0 mV ±(0.3%+1) L m K (45 to 500 Hz, 3.200 V, 32.00 V, 320.0 V ±(2%+2) 3.2 V range. Other 600 V (21/75), 1000 V (23/77) ±(2%+2) ranges 45 to 1 kHz) e 21/75: 320.0 Ω ±(0.5%+2) 3200 Ω, 32.00 kΩ, ±(0.5%+1) 320.0 kΩ 3.200 MΩ ±(0.5%+1) 32.00 MΩ ±(2%+1) 23/77: 320.0 Ω ±(0.5%+3) 3200 Ω, 32.00 kΩ, ±(0.5%+1) 320.0 kΩ 3.200 MΩ ±(0.5%+1) 32.00 MΩ ±(2%+1) G R
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77/75/23/21 English Instruction Sheet Page 12 Overload protection for all functions and ranges: Rated voltage. Function Input Impedance (Nominal) >10 MΩ, <50 pF L, L, K m Common Mode Normal Mode Rejection Rejection Ratio (1 kΩ Unbalanced) >120 dB at dc, >60 dB at 50 Hz or 60 Hz L, L m 50 Hz, or 60 Hz >60 dB dc to 60 Hz K Open Circuit Test Full Scale Voltage Voltage To 3.2 MΩ 32 MΩ <3.1 V dc <440 mV dc <1.4 V dc e <2.8 V dc (typical) <420 mV dc <1.3 V dc (typical) (typical) Open Circuit Test Full
